[ALSA] sb16: add request_firmware()

Load the CSP programs using request_firmware(), if possible, instead of
using the built-in firmware blobs.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

3 files changed, 68 insertions, 8 deletions

diff --git a/include/sound/sb16_csp.h b/include/sound/sb16_csp.h
index caf6fe21514d..736eac71d053 100644
--- a/include/sound/sb16_csp.h
+++ b/include/sound/sb16_csp.h
@@ -114,9 +114,21 @@ struct snd_sb_csp_info {
 #ifdef __KERNEL__
 #include "sb.h"
 #include "hwdep.h"
+#include <linux/firmware.h>
 
 struct snd_sb_csp;
 
+/* indices for the known CSP programs */
+enum {
+        CSP_PROGRAM_MULAW,
+        CSP_PROGRAM_ALAW,
+        CSP_PROGRAM_ADPCM_INIT,
+        CSP_PROGRAM_ADPCM_PLAYBACK,
+        CSP_PROGRAM_ADPCM_CAPTURE,
+
+        CSP_PROGRAM_COUNT
+};
+
 /*
  * CSP operators
  */
@@ -159,6 +171,8 @@ struct snd_sb_csp {
         struct snd_kcontrol *qsound_space;
 
         struct mutex access_mutex;      /* locking */
+
+        const struct firmware *csp_programs[CSP_PROGRAM_COUNT];
 };
 
 int snd_sb_csp_new(struct snd_sb *chip, int device, struct snd_hwdep ** rhwdep);
diff --git a/sound/isa/Kconfig b/sound/isa/Kconfig
index 57371f1a441f..565ed2add38b 100644
--- a/sound/isa/Kconfig
+++ b/sound/isa/Kconfig
@@ -358,6 +358,7 @@ config SND_SBAWE
 config SND_SB16_CSP
         bool "Sound Blaster 16/AWE CSP support"
         depends on (SND_SB16 || SND_SBAWE) && (BROKEN || !PPC)
+        select FW_LOADER
         help
           Say Y here to include support for the CSP core.  This special
           coprocessor can do variable tasks like various compression and
diff --git a/sound/isa/sb/sb16_csp.c b/sound/isa/sb/sb16_csp.c
index fcd638090a9e..3d9d7e0107ca 100644
--- a/sound/isa/sb/sb16_csp.c
+++ b/sound/isa/sb/sb16_csp.c
@@ -161,10 +161,13 @@ int snd_sb_csp_new(struct snd_sb *chip, int device, struct snd_hwdep ** rhwdep)
  */
 static void snd_sb_csp_free(struct snd_hwdep *hwdep)
 {
+        int i;
         struct snd_sb_csp *p = hwdep->private_data;
         if (p) {
                 if (p->running & SNDRV_SB_CSP_ST_RUNNING)
                         snd_sb_csp_stop(p);
+                for (i = 0; i < ARRAY_SIZE(p->csp_programs); ++i)
+                        release_firmware(p->csp_programs[i]);
                 kfree(p);
         }
 }
@@ -687,8 +690,50 @@ static int snd_sb_csp_load_user(struct snd_sb_csp * p, const unsigned char __use
         return err;
 }
 
+#define FIRMWARE_IN_THE_KERNEL
+
+#ifdef FIRMWARE_IN_THE_KERNEL
 #include "sb16_csp_codecs.h"
 
+static const struct firmware snd_sb_csp_static_programs[] = {
+        { .data = mulaw_main, .size = sizeof mulaw_main },
+        { .data = alaw_main, .size = sizeof alaw_main },
+        { .data = ima_adpcm_init, .size = sizeof ima_adpcm_init },
+        { .data = ima_adpcm_playback, .size = sizeof ima_adpcm_playback },
+        { .data = ima_adpcm_capture, .size = sizeof ima_adpcm_capture },
+};
+#endif
+
+static int snd_sb_csp_firmware_load(struct snd_sb_csp *p, int index, int flags)
+{
+        static const char *const names[] = {
+                "sb16/mulaw_main.csp",
+                "sb16/alaw_main.csp",
+                "sb16/ima_adpcm_init.csp",
+                "sb16/ima_adpcm_playback.csp",
+                "sb16/ima_adpcm_capture.csp",
+        };
+        const struct firmware *program;
+        int err;
+
+        BUILD_BUG_ON(ARRAY_SIZE(names) != CSP_PROGRAM_COUNT);
+        program = p->csp_programs[index];
+        if (!program) {
+                err = request_firmware(&program, names[index],
+                                       p->chip->card->dev);
+                if (err >= 0)
+                        p->csp_programs[index] = program;
+                else {
+#ifdef FIRMWARE_IN_THE_KERNEL
+                        program = &snd_sb_csp_static_programs[index];
+#else
+                        return err;
+#endif
+                }
+        }
+        return snd_sb_csp_load(p, program->data, program->size, flags);
+}
+
 /*
  * autoload hardware codec if necessary
  * return 0 if CSP is loaded and ready to run (p->running != 0)
@@ -708,27 +753,27 @@ static int snd_sb_csp_autoload(struct snd_sb_csp * p, int pcm_sfmt, int play_rec
         } else {
                 switch (pcm_sfmt) {
                 case SNDRV_PCM_FORMAT_MU_LAW:
-                        err = snd_sb_csp_load(p, &mulaw_main[0], sizeof(mulaw_main), 0);
+                        err = snd_sb_csp_firmware_load(p, CSP_PROGRAM_MULAW, 0);
                         p->acc_format = SNDRV_PCM_FMTBIT_MU_LAW;
                         p->mode = SNDRV_SB_CSP_MODE_DSP_READ | SNDRV_SB_CSP_MODE_DSP_WRITE;
                         break;
                 case SNDRV_PCM_FORMAT_A_LAW:
-                        err = snd_sb_csp_load(p, &alaw_main[0], sizeof(alaw_main), 0);
+                        err = snd_sb_csp_firmware_load(p, CSP_PROGRAM_ALAW, 0);
                         p->acc_format = SNDRV_PCM_FMTBIT_A_LAW;
                         p->mode = SNDRV_SB_CSP_MODE_DSP_READ | SNDRV_SB_CSP_MODE_DSP_WRITE;
                         break;
                 case SNDRV_PCM_FORMAT_IMA_ADPCM:
-                        err = snd_sb_csp_load(p, &ima_adpcm_init[0], sizeof(ima_adpcm_init),
-                                              SNDRV_SB_CSP_LOAD_INITBLOCK);
+                        err = snd_sb_csp_firmware_load(p, CSP_PROGRAM_ADPCM_INIT,
+                                                       SNDRV_SB_CSP_LOAD_INITBLOCK);
                         if (err)
                                 break;
                         if (play_rec_mode == SNDRV_SB_CSP_MODE_DSP_WRITE) {
-                                err = snd_sb_csp_load(p, &ima_adpcm_playback[0],
-                                                      sizeof(ima_adpcm_playback), 0);
+                                err = snd_sb_csp_firmware_load
+                                        (p, CSP_PROGRAM_ADPCM_PLAYBACK, 0);
                                 p->mode = SNDRV_SB_CSP_MODE_DSP_WRITE;
                         } else {
-                                err = snd_sb_csp_load(p, &ima_adpcm_capture[0],
-                                                      sizeof(ima_adpcm_capture), 0);
+                                err = snd_sb_csp_firmware_load
+                                        (p, CSP_PROGRAM_ADPCM_CAPTURE, 0);
                                 p->mode = SNDRV_SB_CSP_MODE_DSP_READ;
                         }
                         p->acc_format = SNDRV_PCM_FMTBIT_IMA_ADPCM;